to our surprise, after repeatedly declining to be interviewed, sheriff dennis darby himself called us back. he told us there is nothing in this report, and that he wouldn't give it to us. then warned cnn not to, quote, stir up trouble in his county. adding, you do something with this and i'll be coming after you. matthew whit darby, no relation to the sheriff, goes on trial for murder, but not a hate crime, next month. >> this is a really stunning report there are so many inconsistencies here and what the police are saying. the mother of one of the teens in the car who killed the man on the side of the road, she said it was racially motivated. do we know if investigators even talked to her? >> from the records we have obtained, anderson, which include witnesses' list, she is not on any witness list. we have no transcript of any interview that was done with her. so despite that public assertion that she said, look, this was racist and her son was involved, we don't believe that investigators ever went to find out what she was saying. she won't talk to us. basically, she has been tellin